Intraoperative tremor monitoring for vitreoretinal microsurgery.

An instrument for intraoperative sensing of surgeons' hand tremor during vitreoretinal microsurgery has been developed. The instrument uses inertial sensing to detect tremor in six degrees of freedom. Instrument tip velocity is computed using the sensor data. The displacement amplitude of the tremor is then approximated analytically by modeling the velocity as sinusoidal. The instrument presently estimates oscillations at physiological tremor frequencies with error of less than 7%.

[Identification of gram negative, facultative anaerobic, oxidase positive bacilli]. / Identificación de bacilos gramnegativos, anaerobios facultativos, oxidasas positivos.

We identified 100 strains of Gram-negative, oxidase-positive bacilli, facultative anaerobes, isolated from different human pathological products by conventional biochemical methods. From the total number of strains studied, 1 corresponded to genus Vibrio, 66 to genus Aeromonas, and 33 to genus Plesiomonas. It is of the utmost importance to conduct surveillance studies of these microorganisms in order to investigate their circulation in Cuba.

[CAMP factor for the differentiation among Aeromonas species]. / Factor CAMP para la diferenciación en especies de Aeromonas.

The CAMP factor technique, described by Natale Figura as a presumptive method for the differentiation of the species hydrophila, sobria and caviae, was applied to 80 Aeromonas strains isolated from children under 5 years with acute diarrheic disease. The typical phenomenon was seen in aerobiosis and anaerobiosis conditions in 10 strains, which were classified as Aeromonas hydrophila. In aerobiosis conditions/alone, it was observed in 20 strains, which were identified as Aeromonas sobria. It was not observed in either of the incubation conditions above mentioned in 50 of the remaining strains, which were identified as Aeromonas caviae. The advantages of applying this new technique is emphasized.

[Identification of species of microorganisms of the genus Vibrio]. / Identificación de especies de microorganismos del género Vibrio.

During 1988, a study was made on 61 microorganisms, genus Vibrio, which were received at the National Reference Laboratory for Acute Diarrheic Diseases. Pedro Kouri Institute of Tropical Medicine. Of them, 46 were from children with acute diarrheic disease and 15 were isolated from the environment. By means of biochemical tests. 61 Vibrio cholerae No. 01. 9 Vibrio parahaemolyticus and 1 Vibrio alginolyticus were identified. Emphasis is placed upon the importance of keeping a systematic surveillance upon these microorganisms in Cuba.